JPG to AVIF Converter
Create an AVIF delivery copy from a JPG in your browser where supported. Output size and appearance depend on the source, encoder, quality setting, browser, and destination, so compare the download before publishing it.
Re-encoding JPG photos into AVIF
JPG to AVIF Converter re-encodes an existing JPG into AVIF, a format based on AV1 image coding. Depending on the source and settings, the AVIF may be smaller, similar in size, or occasionally larger, and a second lossy pass can change fine detail. For supported files, the tool code performs conversion in the browser and does not intentionally upload the selected image for encoding.
For an image-heavy website, test one difficult photograph at the dimensions used in the real layout. Compare visual detail, transfer bytes, encoding time, browser and CMS support, and the need for a fallback. A smaller file can help transfer time, but it does not by itself guarantee a page-experience improvement.
When AVIF fits, and when it is premature
AVIF is worth testing when the destination supports it and a matched-quality comparison shows a useful saving. Photographs, gradients, and complex scenes can respond differently to each encoder, so inspect the actual result rather than assuming AVIF will be the smallest or visually unchanged.
Keep a tested JPG or WebP alternative when any supported client or publishing system cannot decode AVIF. If encoding time matters, compare WebP as well. A picture element can offer multiple sources, but the right order and fallback depend on measured output and the browsers, crawlers, CMS, and other destinations the site actually supports.
Why this tool uses lossy AVIF
AVIF supports both lossy and lossless compression modes. A JPG source has already gone through lossy compression, so another lossy AVIF pass may reduce its size but can also soften additional detail. A lossless AVIF setting avoids an intentional second lossy pass, but it cannot restore information missing from the JPG and may produce a larger file. The quality slider controls the tradeoff: 65 to 80 percent is a reasonable starting range for a photograph, not a promised result. Compare the output at full size and check the measured file size before replacing the JPG.
AVIF Compared With JPG, WebP, PNG
AVIF can be efficient for some photographic content, but it can also be similar to or larger than another tested output at the quality you need. Use the table as a starting point, then compare the actual image and destination support.
| Format | Compression | Transparency | Best For | Website Impact |
|---|---|---|---|---|
| PNG | Lossless | Yes | Logos, UI elements, screenshots, diagrams, transparent graphics | Often larger, but reliable for sharp edges and text |
| JPG | Lossy | No | Photographs, email attachments, legacy uploads, print preparation | Widely supported across current browsers and common software, but sometimes larger than modern alternatives |
| WebP | Lossy or lossless | Yes | General web delivery, blogs, product images, social previews | Often a useful balance of size and compatibility; verify the supported clients |
| AVIF | Lossy or lossless | Yes | Testing modern delivery copies for supported photo, HDR, or wide-gamut workflows | Size varies by source, encoder, and quality; verify support and a fallback |
How To Convert JPG To AVIF
- Upload one or more JPG files from your device using the file picker or drag and drop.
- Adjust the AVIF quality slider to test file size against visual detail for your use case.
- Click Convert and let the browser encode the AVIF version on the device where supported.
- Download the result, compare it with the JPG, and use it only when the measured result and destination support justify the change.
Mistakes That Undermine AVIF Savings
Serving AVIF without checking every supported client. Provide a tested WebP or JPG alternative when the actual audience or publishing system needs one.
Setting quality too low for hero images. Aggressive compression saves bytes but can introduce visible banding in gradients and sky areas.
Converting already-compressed JPGs multiple times. Each lossy re-encoding degrades quality, so start from the highest quality JPG source you have.
Assuming AVIF works everywhere. Email clients, office software, and some social platforms still reject AVIF uploads, so check destination support first.
Frequently Asked Questions
Does JPG to AVIF compress the image twice, and does it show?
There can be two lossy passes: the JPG already discarded data and AVIF can discard more. The output may be smaller, similar, or larger depending on the source and settings, and fine detail can change. Start from the highest-quality source available and compare the download.
Why is AVIF encoding slower than other conversions in my browser?
AVIF encoding can require more analysis and can run slowly on large images or older devices. Encoding time and any byte saving depend on the source, browser, device, encoder, and settings, so test a representative file before starting a batch.
Does the JPG's metadata, like camera and date, carry into the AVIF?
No. The picture is decoded onto a canvas before AVIF encoding, so EXIF fields such as camera model, timestamp, and GPS are dropped. This quietly removes hidden personal data before you publish, which is usually welcome. If you rely on those details for sorting or attribution, capture them separately before converting the JPG.
Related Converters
JPG to AVIF can be a web-optimization step when AVIF is supported by the destination. Compare the measured output size and visible detail with the original JPG before deciding which file to publish.
AVIF to JPG
Go the other direction when you need to convert AVIF back to JPG for legacy compatibility.
Open AVIF to JPGPNG to AVIF
Convert PNG graphics and screenshots to AVIF for modern web delivery with transparency support.
Open PNG to AVIFJPG to WebP
Choose WebP when you need broader browser support than AVIF currently offers.
Open JPG to WebPCompress Image
Reduce file size further after format conversion when upload limits or page speed are critical.
Open Compress ImagePNG to WebP
Convert PNG files to WebP when you want broad browser compatibility with good compression.
Open PNG to WebPImage Format Converter
Pick any output format when you are not sure whether AVIF, WebP, JPG, or PNG fits best.
Open Image Format Converter